import { 
  Controller, 
  Get, 
  Post, 
  Put, 
  Delete, 
  Body, 
  Param, 
  Query, 
  ParseIntPipe,
  HttpStatus,
  HttpCode
} from '@nestjs/common';
import { ApiTags, ApiOperation, ApiResponse, ApiParam, ApiBearerAuth } from '@nestjs/swagger';
import { Roles, CurrentUser } from '@app/auth';
import { 
  CreateUserDto, 
  UpdateUserDto, 
  QueryUsersDto, 
  ResetPasswordDto, 
  BatchUserActionDto,
  UserInfoDto 
} from '../dto';
import { UsersService } from '../services/users.service';

@ApiTags('用户管理')
@ApiBearerAuth()
@Controller('admin/users')
export class UsersController {
  constructor(private readonly usersService: UsersService) {}

  @Get()
  @ApiOperation({ summary: '获取用户列表' })
  @ApiResponse({ status: 200, description: '返回用户列表' })
  @Roles('admin')
  async findAll(@Query() query: QueryUsersDto) {
    const result = await this.usersService.findAll(query);
    return {
      code: 200,
      data: result,
      message: '获取成功'
    };
  }

  @Get(':id')
  @ApiOperation({ summary: '获取用户详情' })
  @ApiParam({ name: 'id', description: '用户ID' })
  @ApiResponse({ status: 200, description: '返回用户详情' })
  @Roles('admin')
  async findOne(@Param('id', ParseIntPipe) id: number) {
    const user = await this.usersService.findOne(id);
    return {
      code: 200,
      data: user,
      message: '获取成功'
    };
  }

  @Post()
  @ApiOperation({ summary: '创建用户' })
  @ApiResponse({ status: 201, description: '用户创建成功' })
  @Roles('admin')
  async create(@Body() createUserDto: CreateUserDto, @CurrentUser() user: any) {
    const newUser = await this.usersService.create(createUserDto);
    return {
      code: 201,
      data: newUser,
      message: '创建成功'
    };
  }

  @Put(':id')
  @ApiOperation({ summary: '更新用户信息' })
  @ApiParam({ name: 'id', description: '用户ID' })
  @ApiResponse({ status: 200, description: '用户更新成功' })
  @Roles('admin')
  async update(
    @Param('id', ParseIntPipe) id: number,
    @Body() updateUserDto: UpdateUserDto,
    @CurrentUser() user: any
  ) {
    // TODO: 更新用户
    return {
      code: 200,
      data: null,
      message: '更新成功'
    };
  }

  @Put(':id/password')
  @ApiOperation({ summary: '修改用户密码' })
  @ApiParam({ name: 'id', description: '用户ID' })
  @ApiResponse({ status: 200, description: '密码修改成功' })
  @Roles('admin')
  async changePassword(
    @Param('id', ParseIntPipe) id: number,
    @Body() changePasswordDto: ResetPasswordDto
  ) {
    // TODO: 修改密码
    return {
      code: 200,
      data: null,
      message: '密码修改成功'
    };
  }

  @Delete(':id')
  @ApiOperation({ summary: '删除用户' })
  @ApiParam({ name: 'id', description: '用户ID' })
  @ApiResponse({ status: 200, description: '用户删除成功' })
  @Roles('admin')
  async remove(@Param('id', ParseIntPipe) id: number, @CurrentUser() user: any) {
    // TODO: 删除用户
    return {
      code: 200,
      data: null,
      message: '删除成功'
    };
  }

  @Post('batch')
  @ApiOperation({ summary: '批量操作用户' })
  @ApiResponse({ status: 200, description: '批量操作成功' })
  @Roles('admin')
  async batchAction(@Body() batchActionDto: BatchUserActionDto) {
    // TODO: 实现批量操作逻辑
    return {
      code: 200,
      data: {
        processed: batchActionDto.userIds.length,
        action: batchActionDto.action
      },
      message: '批量操作成功'
    };
  }

  @Put(':id/ban')
  @ApiOperation({ summary: '封禁用户' })
  @ApiParam({ name: 'id', description: '用户ID' })
  @ApiResponse({ status: 200, description: '用户封禁成功' })
  @Roles('admin')
  async banUser(@Param('id', ParseIntPipe) id: number) {
    // TODO: 封禁用户
    return {
      code: 200,
      data: null,
      message: '封禁成功'
    };
  }

  @Put(':id/unban')
  @ApiOperation({ summary: '解封用户' })
  @ApiParam({ name: 'id', description: '用户ID' })
  @ApiResponse({ status: 200, description: '用户解封成功' })
  @Roles('admin')
  async unbanUser(@Param('id', ParseIntPipe) id: number) {
    // TODO: 解封用户
    return {
      code: 200,
      data: null,
      message: '解封成功'
    };
  }

  @Get(':id/posts')
  @ApiOperation({ summary: '获取用户文章列表' })
  @ApiParam({ name: 'id', description: '用户ID' })
  @ApiResponse({ status: 200, description: '返回用户文章列表' })
  @Roles('admin', 'editor')
  async getUserPosts(@Param('id', ParseIntPipe) id: number, @Query() query: any) {
    // TODO: 获取用户文章
    return {
      code: 200,
      data: {
        posts: [],
        pagination: {
          page: query.page || 1,
          limit: query.limit || 10,
          total: 0,
          totalPages: 0
        }
      },
      message: '获取成功'
    };
  }

  @Get(':id/stats')
  @ApiOperation({ summary: '获取用户统计信息' })
  @ApiParam({ name: 'id', description: '用户ID' })
  @ApiResponse({ status: 200, description: '返回用户统计信息' })
  @Roles('admin', 'editor')
  async getUserStats(@Param('id', ParseIntPipe) id: number) {
    // TODO: 获取用户统计
    return {
      code: 200,
      data: {
        postsCount: 0,
        publishedPostsCount: 0,
        draftPostsCount: 0,
        totalViews: 0,
        totalLikes: 0,
        totalComments: 0,
        joinDate: null,
        lastLoginAt: null
      },
      message: '获取成功'
    };
  }
}
